74LS Series ICs are High-Speed Logic gates, ideally a little faster than 74HC series but more power consumption is required. They are implemented with a Low-Power Schottky diode technology to achieve high switching speed. 74LS165 is one of the 74LS series IC. 74LS165 ICs contain an 8-Bit Parallel In/Serial Out shift register. The data is shifted from Qa to Qh synchronously. Data at the parallel inputs are loaded directly into the register when SH/LD is low, independently of the levels of CLK, CLK INH, or serial (SER) input. 74LS165 also has a feature of the complementary output of the last state.
The 74LS165 ICs have an operating range of VCC from 4.5 V to 5.5 V. Maximum current consumption is 30 mA through Icc and 0.1 mA per input pin. And the maximum propagation delay is 24 ns. They can provide 0.4 mA at High Input and 8 mA at Low Input. They allow inputs and outputs up to VCC. The recommended operating VCC is 5 V.
Specification:
| Operating Voltage Range | 4.5 V to 5.5 V |
| Package | DIP−16 |
| Input Current | 0.1 mA |
| Powering Current | 30 mA |
| Propagation Delay | 24 ns |
| Temperature Range | -65 °C - 150 °C |
Pin Configuration:
| Parallel Input (A, B, C, D, E, F, G, H) | 2, 3, 5, 6, 11, 10, 14, 13 |
| Inverting Output (QH') | 7 |
| Non-Inverting Output (QH) | 9 |
| Load Input (SH/LD') | 1 |
| Clock (CLK, CLK INH) | 2, 15 |
| Serial (SER) | 10 |
| Power Supply (VCC) | 16 |
| Ground (GND) | 8 |
| Country of Origin | China |
